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LEVI F. BRAKE Jfnvn ENocH EGGINTON, ,or PORTLAND, MAINE.

lLetters Patent No. 72,376, dated -Decemer 17, 1867. y

IMPROVEMENTIN LAMPS.

TO -ALL WHOM IT MAY CON CERN:

Be it known that we,'LnvI F. DRAKE and ENocnEGGIN'roN, of Portland, in the'county of Cumberland, and State of Maine, 'have invented certain newl and useful Improvements in Lamps; and we hereby declare the following to b e a full, clear, and exactidescription thereof, which will enable others to make andnseour invention, reference' being had to the accompanying drawings, forming part of this specification, in which'- Figure 1 shows a side view of a lamp-top, cone, and chimney, ,embodying our improvements.

Figure 2, aside view of the translucent cone. d Figure 3, aview of the bottom end of the lamp-chimney.

' v Figure 4,9. view of a portion of .the top rim of the lamp-top, broken out in detail, in order to show the l method of securing the cone.

Transparent lamp-cones for this description of lamps have already been patented, but we do not claim such.

t isI well known that the use of translucent material, such as porcelain, wheniemployed to diffuse'light in an' apartment, producesan illumination exceedingly soft vand agreeable to the eye, and-one not Aexhibiting any of the dazzling characteristics whicliare both unpleasant and hurtful to the eye'. Globesffor lamps, made of this and other similar material, have long' been in use. By the use of such material for a lamp-cone, in the kind of lamps termed kerosene o'r coal-oilrlamps, much light could be gained over the common metlalfconei, andstill the.4 eects of the light, as transmitted througha transparent cone, could be avoided.` .This lis one ofy .the purposes,

of our invention; With lthis view, we make a cone of porcelain or other 'similar-material, in the common general i shape, butwith the intention that the same shall not be perfectlydiaphanous, but allow the-light to pass through the same in a softer and less dazzling condition than when sent through transparent-glass, thus attaining that condition of the illuminating medium, and the means of diiusing the same, before adverted' to.

a shows the cone.. This cone, thus constructed, is secured to the lamp-top as follows: fIn the said'top is Y made, ashortdistance from the edge thereof, a'small vertical slot; then, leading from this,"'a horizontal one. Two

or more of these may be made, as desired. A This slot is delineated in g. 1, at I. cshows vproiecticns on the bottom edge of the cone. These are placed into the vertical portions ofthe slotsb;4 then,'by tur ning the cone in the fingers, the projections c pass into the longitudinal part of the slot, and ths, Vtvh'ensu'ch slots are made on two sides of the lamp-top, and two projections on the cone, the cone is held on the lamp-top. Thus thefcone can be placed on or removed from the lamp-top. d shows ribs on the cone. Over these ribs. the chimney e'is placed, the grooves on the inside of the bottom of the chimney fitting `on to, the same. f shows the groovesfin the chimney. More or less of these ribs and grooves may'be made, according'to the Vwishes. of the m'unufac; turers. This iitting of the grooves f over the ribs d does not, however, allow the-.under circumferencev of the chimney to come in contact with the cone when the chimney passes over the same`,cbrut, on the contrary, leaves a space between each rib; in other words, the ribs project from the cone morefthanth'edepth of vthe grooves. Thus, as the lamp isv ignited, a current of air passes up between cone and chimney, and betwt-:en'l the ribs d, which current, rising in consequence of the heating of the air around the lamp-flame, supplies fresh airto the ilame, .irnits passage between the chimney and the conefpreservcs the chimney-bottom cool. l The chimney'is held to 'thc cone b y the adhesion of the glass of the chimney to thc material of the cone, which adhesion may be assisted by roughing the cone on' the outer part of its ribs, so as to increase the friction and adhesion. -Wc construct our chimney' bythe ordinary methods, and before quite cooled, but when in a somewhat` malleable condition, pressing the same down over a cone or former, in oiderto form the grooves, and in'order lthat they may conform to the ribsbn thc Vcone. v

We do not claim constructing a cone of a transparent material, neither do we claim corrugatingthe conea bottom, in order to form indentations, by which a supply of air is prevented from beingcut oil' from the flame. This is not the purpose of our invention; but we have in view to keep the bottom of a chimney, simply fitting l over the cone, and there held by friction, and removable as described, cool, so that it may be grasped between the thumb and finger, andremoved without burning the same. With this arrangement, the chimneyfis heldalso by theexpausion of the cone by the heat of the burning lamp. The edges ofthe slots in the lamp-top are made so as to form a spring, in order better to hold the cone. v

We do not claim attaching the chimney by means of springs attached' to the deiiector, operatingon the inside of the chimney, so that no outsdecircle points are needed, as shown-in the patent of O. Snow and H. S. Snow, June 12, 1860,`No. 28,695. 4 i

What we claim' as our invention, end desire to secure by Letters Patent, is- 1. Making the cone with the ribs and the small projections :Lt the bottom, as and for thc specified purposes. 2. The chimney, fitting over the cone when held on the same, as specfeli, and constructed withthe grooves,

as und for the purposes set forth.

LEVI F. DRAKE,

ENOGI-I' EGGINTON. Witnesses:

WILLIAM HENRY CLIFFORD, WM. FRANK SEAVEY. 

